CN113868580A

CN113868580A - Method for determining minimum peak regulation output of industrial steam supply working condition of extraction condensing heat supply unit

Info

Publication number: CN113868580A
Application number: CN202110962985.6A
Authority: CN
Inventors: 杨海生; 唐广通; 张营; 李�浩; 闫晓沛
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd; State Grid Hebei Energy Technology Service Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-12-31

Abstract

The invention is suitable for the technical field of heat supply units, and provides a method for determining the minimum peak load regulation output of an industrial steam supply working condition of a pumping condensing heat supply unit, which comprises the following steps: acquiring experimental steam supply quantity and experimental pressure difference obtained by each industrial steam supply section experiment, and determining a resistance characteristic function of each industrial steam supply section; calculating the pressure difference of each industrial steam supply section under the preset steam supply amount, and determining the minimum steam extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply amount; initializing main steam flow, and adjusting the current main steam flow based on the difference value between the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow and the minimum steam extraction pressure to obtain the minimum main steam flow meeting the steam supply requirement; and determining the minimum peak-load-adjusting output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement. The invention can obtain more accurate minimum peak-shaving output.

Description

Method for determining minimum peak regulation output of industrial steam supply working condition of extraction condensing heat supply unit

Technical Field

The invention belongs to the technical field of heat supply units, and particularly relates to a method, a device and a terminal for determining minimum peak shaving output of industrial steam supply working conditions of a pumping and condensing heat supply unit.

Background

At present, the national energy agency 2016 & 2020 development and planning of thermal power flexibility transformation technology are clearly proposed, and the peak regulation amplitude of the existing thermal power generating unit is improved. Under the industrial steam supply working condition, the minimum peak regulation output performance of the extraction condensing heat supply unit is directly related to the operation parameters of the external industrial steam supply of the unit, and the minimum peak regulation output performance can be adjusted by adjusting the operation parameters of the extraction condensing heat supply unit.

However, the peak shaving characteristic curve of the industrial steam supply working condition provided by the steam turbine manufacturer has great deviation when the minimum peak shaving output of the actual computer unit is adopted. Therefore, how to accurately determine the relevant characteristics of the minimum peak regulation output of the extraction and condensation heat supply unit under the industrial steam supply working condition and further furthest excavate the peak regulation potential of the extraction and condensation heat supply unit under the industrial steam supply working condition is a great problem to be solved in the front of a power plant.

Disclosure of Invention

In view of the above, the invention provides a method for determining the minimum peak load regulation output of the industrial steam supply working condition of the extraction condensing heat supply unit, so as to solve the problem of low accuracy of an industrial steam supply peak load regulation characteristic curve provided by a steam turbine manufacturer.

The first aspect of the embodiment of the invention provides a method for determining minimum peak load regulation output of an industrial steam supply working condition of a pumping condensing heat supply unit, which comprises the following steps:

acquiring experimental steam supply quantity and experimental pressure difference obtained by each industrial steam supply section experiment, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply quantity and the experimental pressure difference;

according to the resistance characteristic function of each industrial steam supply section, calculating the pressure difference of each industrial steam supply section under the preset steam supply amount, and determining the minimum steam extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply amount based on the preset steam supply amount, the lowest steam utilization parameter of the user side and the pressure difference of each industrial steam supply section;

initializing a main steam flow;

determining steam extraction pressure of a steam turbine under an industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure of the steam turbine and the minimum steam extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the step until the minimum main steam flow meeting the steam supply requirement is obtained;

and determining the minimum peak-load-adjusting output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

The second aspect of the embodiments of the present invention provides a device for determining a minimum peak load regulation output of an industrial steam supply working condition of a condensing and heat supply unit, including:

the characteristic determining module is used for acquiring experimental steam supply quantity and experimental pressure difference obtained by each industrial steam supply section experiment, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply quantity and the experimental pressure difference;

the minimum pressure determining module is used for calculating the pressure difference of each industrial steam supply section under the preset steam supply quantity according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity based on the preset steam supply quantity, the minimum steam utilization parameter of the user side and the pressure difference of each industrial steam supply section;

the initialization module is used for initializing the main steam flow;

the main steam flow determining module is used for determining the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure of the steam turbine and the minimum steam extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the step until the minimum main steam flow meeting the steam supply requirement is obtained;

and the minimum output determining module is used for determining the minimum peak-load-adjusting output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

A third aspect of the embodiments of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for determining the minimum peak load shaving capacity of the industrial steam supply condition of the extraction and condensation heating unit when executing the computer program.

A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the method for determining the minimum peak load regulation output of the industrial steam supply condition of the extraction and condensation heating unit according to any one of the above embodiments is implemented.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a method for determining the minimum peak regulation output of an industrial steam supply working condition of a condensation extraction heat supply unit, which comprises the following steps: acquiring experimental steam supply quantity and experimental pressure difference obtained by each industrial steam supply section experiment, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply quantity and the experimental pressure difference; according to the resistance characteristic function of each industrial steam supply section, calculating the pressure difference of each industrial steam supply section under the preset steam supply amount, and determining the minimum steam extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply amount based on the preset steam supply amount, the lowest steam utilization parameter of the user side and the pressure difference of each industrial steam supply section; initializing a main steam flow; determining steam extraction pressure of a steam turbine under an industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure of the steam turbine and the minimum steam extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the step until the minimum main steam flow meeting the steam supply requirement is obtained; and determining the minimum peak-load-adjusting output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement. The minimum extraction pressure is determined through the resistance characteristic function of each industrial steam supply section of the extraction condensing heat supply unit, the main steam flow is adjusted through the difference value of the pressure of the steam extraction section of the steam turbine and the minimum extraction pressure, the minimum main steam flow meeting the steam supply requirement is obtained, the accurate minimum peak-load regulation output is obtained through calculation based on the main steam flow, and the peak-load regulation running performance of the extraction condensing heat supply unit under the industrial steam supply working condition is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a flow chart of an implementation of a method for determining a minimum peak shaving output of an industrial steam supply working condition of a condensing and heat supply unit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a device for determining the minimum peak shaving output of the industrial steam supply working condition of the extraction condensing heat supply unit according to the embodiment of the invention;

fig. 3 is a schematic diagram of a terminal provided in an embodiment of the present invention;

fig. 4 is a schematic view of an application scenario of an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.

Referring to fig. 1, it shows an implementation flowchart of the method for determining the minimum peak load regulation output of the industrial steam supply working condition of the extraction condensing heating unit according to the embodiment of the present invention, and the method is applied to a terminal device, and is detailed as follows:

step 101, obtaining experimental steam supply quantity and experimental pressure difference obtained by each industrial steam supply section experiment, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply quantity and the experimental pressure difference.

In this embodiment, the condensing and heat-supplying unit needs to pass through a long steam supply pipeline when supplying steam to the industrial steam supply users, and for convenience of description and calculation, the steam supply pipeline from the condensing and heat-supplying unit to each industrial steam supply user is divided into a plurality of industrial steam supply sections. The terminal equipment can calculate the pressure value at the end point of each industrial steam supply section in a certain steam supply state based on the resistance characteristic function of each industrial steam supply section.

Optionally, the industrial steam supply section comprises a first industrial steam supply section, a second industrial steam supply section and a third industrial steam supply section, the first industrial steam supply section is an industrial steam supply section between the tail end of an industrial steam supply main pipe and an industrial steam supply user end, the second industrial steam supply section is an industrial steam supply section between the power plant end of the industrial steam supply main pipe and the tail end of the industrial steam supply main pipe, and the third industrial steam supply section is an industrial steam supply section between the steam extraction port of a steam turbine of the extraction and condensation heat supply unit and the power plant end of the industrial steam supply main pipe; the experimental steam supply amount comprises user side experimental steam supply amount of at least one industrial steam supply user, at least one total experimental steam supply amount and at least one experimental steam supply amount of a steam turbine of the extraction condensing heat supply unit.

In this embodiment, as shown in fig. 4, a plurality of condensing and heat-supplying units 401 may be present to simultaneously supply steam to the industrial steam supply main pipe 402, and the industrial steam supply main pipe 402 may also simultaneously supply steam to a plurality of industrial steam supply users 403, so that the sum of the steam supply amounts of the condensing and heat-supplying units 401 is the total steam supply amount in the industrial steam supply main pipe 402, and the sum of the steam supply amounts of the user sides of the industrial steam supply users 403 is also the total steam supply amount in the industrial steam supply main pipe 402. In this embodiment, the experimental steam supply amount of the condensing heat supply unit steam turbine is the steam supply amount of the condensing heat supply unit steam turbine during the experiment, the user side experimental steam supply amount is the user side steam supply amount during the experiment, the total experimental steam supply amount is the total steam supply amount during the experiment, and the experimental steam supply amount of the steam turbine is the steam supply amount of the steam turbine during the experiment.

Accordingly, step 101 comprises:

step 1011, obtaining a plurality of user side experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on a first industrial steam supply section corresponding to a target industrial steam supply user and a pressure difference of the corresponding first industrial steam supply section under each user side experimental steam supply amount; the target industrial steam supply user is any industrial steam supply user.

In this embodiment, the process of performing the experiment on the resistance characteristic of the pipeline system in the first industrial steam supply section is specifically as follows:

1) carrying out a steam supply pipeline resistance characteristic experiment on any industrial steam supply user (i-th user);

2) keeping the tail end parameters of the industrial steam supply main pipe stable, wherein the pressure and the temperature are pmge0 and tmge0 respectively, and the units are MPa and ℃;

3) and keeping the tail end of the industrial steam supply main pipe to the valve of the user pipeline fully opened, and changing the user side experimental steam supply amount of the target industrial steam supply user by adjusting the user side steam consumption amount. At least two steam supply flow tests are carried out, and the steam supply flow Fyh (i, j), the steam supply pressure pyh (i, j) and the steam supply temperature tyh (i, j) of the user side are recorded. j denotes the j-th experiment. The units are t/h, MPa and DEG C respectively

4) Calculating the pressure difference of a first industrial steam supply section corresponding to the ith industrial steam supply user during the jth test:

△p(i,j)＝pmge0(i,j)-pyh(i,j)

and step 1012, fitting a resistance characteristic function of the first industrial steam supply section corresponding to the target industrial steam supply user based on each user side experimental steam supply amount of the target industrial steam supply user and the pressure difference of the corresponding first industrial steam supply section under each user side experimental steam supply amount.

In this embodiment, the resistance characteristic function of the first industrial steam supply section corresponding to the target industrial steam supply user is a quadratic function, and is used for calculating the pressure difference of the first industrial steam supply section corresponding to the target industrial steam supply user at any user side steam supply amount.

And 1013, acquiring a plurality of total experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on the second industrial steam supply section and the pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply amount.

In this embodiment, a resistance characteristic experiment of the pipeline system is performed on the second industrial steam supply section, and the experimental process specifically includes the following steps:

1) the method comprises the steps of adjusting the total experimental steam supply amount in the industrial steam supply main pipe, and recording power plant end and tail end operation parameters of the industrial steam supply main pipe under different total experimental steam supply amounts (at least four) conditions, wherein the power plant end and tail end operation parameters comprise the total experimental steam supply amount Fgc (k), industrial steam supply main pipe power plant end pressure pmgs0(k), industrial steam supply main pipe power plant end steam supply temperature tmgs0(k), industrial steam supply main pipe tail end pressure pmge0(k) and industrial steam supply main pipe tail end temperature tmge0 (k). The pressure and temperature units are respectively MPa and the flow unit is t/h.

2) And calculating the steam supply pressure difference from the power plant end of the industrial steam supply main pipe to the tail end of the industrial steam supply main pipe under the kth total experimental steam supply amount.

△p(k)＝pmgs0(k)-pmge0(k)

And 1014, fitting a resistance characteristic function of the second industrial steam supply section based on each total experimental steam supply quantity and the pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply quantity.

In this embodiment, the resistance characteristic function of the second industrial steam supply section is a quadratic function, and is used to calculate the pressure difference of the corresponding second industrial steam supply section at any total steam supply amount.

Step 1015, acquiring a plurality of experimental steam supply amounts of the target steam turbine and the pressure difference of the target steam turbine in the third industrial steam supply section under each experimental steam supply amount, wherein the experimental resistance characteristics of the pipeline system are performed on the third industrial steam supply section corresponding to the target steam turbine; the target turbine is any turbine.

In this embodiment, the experimental process of the resistance characteristic of the pipeline system for the third industrial steam supply section is specifically as follows:

1) and (3) carrying out resistance characteristic experiments on a pipeline system from a steam extraction port of a steam turbine of each heat supply unit in the power plant to an industrial steam supply main pipe power plant end.

2) The method comprises the steps of keeping an ijz th steam extraction opening of a steam turbine of a heat supply unit to a valve at the end of an industrial steam supply main pipe power plant to be kept fully open, and changing the experimental steam supply quantity of the steam turbine by adjusting the load of the unit. At least two steam turbines are tested for the experimental steam supply, and the experimental steam supply Fgc (ijz, l), the steam extraction pressure pcq (ijz, l) and the steam extraction temperature tcq (ijz, l) of the ijz th heat supply unit steam turbine, the industrial steam supply main pipe power plant end pressure pmgs0(l), the steam supply temperature tmgs0(l), the temperature of the temperature-reduced water pjw (l) and the temperature of the temperature-reduced water tjw (l) are recorded. l represents the first test data. The steam supply, pressure and temperature are respectively in t/h, MPa and deg.C.

3) Calculating the steam supply pressure difference from the steam extraction port of the steam turbine to the industrial steam supply main pipe power plant end during the first test:

△p(ijz,l)＝pcq(ijz,l)-pmgs0(l)

and step 1016, fitting a resistance characteristic function of a third industrial steam supply section corresponding to the target steam turbine based on each experimental steam supply quantity of the target steam turbine and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply quantity.

In this embodiment, the resistance characteristic function of the third industrial steam supply section corresponding to the target steam turbine is a quadratic function, and is used for calculating the pressure difference of the third industrial steam supply section of the target steam turbine under the steam supply amount of any steam turbine.

And 102, calculating the pressure difference of each industrial steam supply section under the preset steam supply amount according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply amount based on the preset steam supply amount, the minimum steam utilization parameter of the user side and the pressure difference of each industrial steam supply section.

In this embodiment, the preset steam supply amount is used to represent a certain steam supply distribution state, that is, the user-side steam supply amount of each industrial steam supply user and the steam supply amount of the steam turbine of each extraction and condensation heat supply unit are given, and the sum of the user-side steam supply amounts of each industrial steam supply user is equal to the sum of the steam supply amounts of the steam turbine of each extraction and condensation heat supply unit. And the terminal equipment determines the minimum extraction pressure of the steam turbine meeting the minimum steam consumption parameter of the user side under the preset steam supply quantity based on the resistance characteristic function of each industrial steam supply section and the minimum steam consumption parameter of the user side.

Optionally, the preset steam supply amount includes a user-side preset steam supply amount of at least one industrial steam supply user, a preset steam turbine steam supply amount and a total preset steam supply amount; the user side minimum steam consumption parameters comprise minimum steam consumption pressure and minimum steam consumption temperature of each industrial steam supply user.

Accordingly, step 102 includes:

step 1021, determining the pressure difference of the first industrial steam supply section of each industrial steam supply user under the user side preset steam supply amount corresponding to each industrial steam supply user based on the user side preset steam supply amount of each industrial steam supply user and the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user.

In this example, the minimum steam pressure is in MPa and the minimum steam temperature is in ℃. The terminal equipment substitutes the preset steam supply quantity of the user side of each industrial steam supply user into the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user respectively, and the pressure difference of the first industrial steam supply section of each industrial steam supply user under the corresponding preset steam supply quantity of the user side can be obtained.

Step 1022, calculating pmgemin ═ Max [ pmin (i) + Δ p (i) ], to obtain a minimum pressure value at the tail end of the industrial steam supply main pipe under the preset steam supply amount at the user side of each industrial steam supply user, wherein pmgemin represents the minimum pressure value at the tail end of the industrial steam supply main pipe, pmin (i) represents the minimum steam pressure of the ith industrial steam supply user, and Δ p (i) represents the pressure difference of the first industrial steam supply section corresponding to the ith industrial steam supply user under the preset steam supply amount at the user side of each industrial steam supply user; max [ ] represents the maximum function.

In this embodiment, the terminal device adds the lowest steam consumption parameter of any industrial steam supply user to the pressure difference of the first industrial steam supply section of the industrial steam supply user at the corresponding user side preset steam supply amount to obtain the lowest pressure at the tail end of the industrial steam supply main pipe of the industrial steam supply user at the corresponding user side preset steam supply amount. And the terminal equipment respectively calculates the lowest pressure at the tail end of the industrial steam supply main pipe of each industrial steam supply user at the corresponding user side preset steam supply amount, and selects the maximum value as the lowest pressure at the tail end of the industrial steam supply main pipe in the preset steam supply distribution state. The lowest pressure at the tail end of the industrial steam supply main pipe is the lowest pressure at the tail end of the industrial steam supply main pipe which can meet the lowest steam using pressure of each industrial steam supply user.

And 1023, obtaining the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply quantity based on the total preset steam supply quantity and the resistance characteristic function of the second industrial steam supply section.

In this embodiment, the total preset steam supply amount is the sum of the preset steam supply amounts at the user side of each industrial steam supply user, and is also equal to the sum of the preset steam supply amounts of the steam turbines of each extraction and condensation heat supply unit.

And step 1024, obtaining the minimum pressure value of the power plant end of the industrial steam supply main pipe based on the minimum pressure value of the tail end of the industrial steam supply main pipe and the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply amount.

In this embodiment, the terminal device adds the minimum pressure value at the tail end of the industrial steam supply main pipe and the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply amount to obtain the minimum pressure value at the power plant end of the industrial steam supply main pipe.

And 1025, determining the pressure difference of the steam turbine of the extraction and condensation heat supply unit in the third industrial steam supply section under the preset steam turbine steam supply quantity based on the preset steam turbine steam supply quantity and the resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction and condensation heat supply unit.

In this embodiment, the terminal device substitutes the preset steam supply amount of the steam turbine into the resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction and condensation heat supply unit to obtain the pressure difference of the third industrial steam supply section of the steam turbine of the extraction and condensation heat supply unit under the preset steam supply amount of the steam turbine.

Step 1026, calculate pcq (i)_jz)mⁿ＝Pmgsmin+Δp(i_jz) Obtaining the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine, wherein pcq (i)_jz) min represents the minimum extraction pressure, P, of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbinemgsmin represents the minimum pressure value, Δ p (i) at the end of the industrial steam main line power plant_jz) The pressure difference, i, of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine_jzIndicating the turbine number.

In this embodiment, the terminal device adds the minimum pressure value of the industrial steam supply main pipe power plant end at the preset steam supply amount to the pressure difference of the third industrial steam supply section of the steam turbine of the extraction and condensation heat supply unit at the preset steam supply amount of the steam turbine to obtain the minimum steam extraction pressure of the steam turbine of the extraction and condensation heat supply unit at the preset steam supply amount of the steam turbine.

Step 103, initializing a main steam flow.

In this embodiment, the main steam flow rate is a main steam flow rate of a steam turbine of the extraction condensing heat supply unit. The terminal equipment needs to select a main steam flow value as an initial value to calculate the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to each main steam flow, and determines the minimum main steam flow meeting the steam supply requirement based on each main steam flow and the steam extraction pressure of the steam turbine under the corresponding industrial steam supply working condition.

104, determining steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow; and adjusting the current main steam flow based on the difference value between the steam extraction pressure of the steam turbine and the minimum steam extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the step until the minimum main steam flow meeting the steam supply requirement is obtained.

In this embodiment, the terminal device adjusts the current main steam flow based on the difference between the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow and the minimum steam extraction pressure, so that the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow is constantly close to the minimum steam extraction pressure, and thus the minimum main steam flow meeting the steam supply requirement is obtained.

Optionally, the preset steam supply amount comprises a preset steam supply amount of a steam turbine.

Accordingly, step 104 includes:

step 1041, obtaining preset steam supply amount of the steam turbine, a ratio of extraction amount to industrial steam supply amount, a first pressure calculation function, a second pressure calculation function and a first flow calculation function, wherein the first pressure calculation function is a function for calculating a first extraction pressure based on the main steam flow, the second pressure calculation function is a function for calculating a first extraction pressure based on the first through-flow steam flow, the first flow calculation function is a function for calculating the first through-flow steam flow based on the main steam flow, the first extraction pressure is an extraction pressure of a first extraction section, the first through-flow steam flow is a through-flow steam flow of the steam turbine after the first extraction section, and the first extraction section is a steam extraction section of the steam turbine corresponding to the industrial steam supply main pipe.

In this embodiment, the first pressure calculation function is a linear function and can be obtained by fitting each main steam flow under a plurality of pure condensing design conditions and the first extraction pressure parameter corresponding to each main steam flow, the second pressure calculation function is a linear function and can be obtained by fitting each first through-flow steam flow under a plurality of pure condensing design conditions and the first extraction pressure parameter corresponding to each first through-flow steam flow, and the first flow calculation function is a linear function and can be obtained by fitting each main steam flow under a plurality of pure condensing design conditions and the first through-flow steam flow parameter corresponding to each main steam flow. And the ratio of the extracted steam quantity to the industrial steam supply quantity is used for calculating the extracted steam quantity of the steam turbine corresponding to the steam supply quantity of any steam turbine.

Optionally, step 1041 includes:

step 10411, obtaining steam supply pressure, steam supply temperature, reduced water pressure, reduced water temperature, steam extraction pressure of the steam turbine, and steam extraction temperature of the steam turbine at the end of the power plant of a plurality of industrial steam supply main pipes, which are obtained by performing steam extraction amount-industrial steam supply amount ratio experiments on the extraction condensing heat supply unit.

Step 10412, calculate

Obtaining the steam extraction-industrial steam supply ratio in the first steam extraction-industrial steam supply ratio experiment;

wherein K (l) represents the ratio of extraction steam quantity to industrial steam supply quantity in the first test, l represents the experimental times of the ratio of extraction steam quantity to industrial steam supply quantity, hpt (p, t) represents the pressure and medium pressure of the mediumPmgs0(l) represents steam supply pressure at the end of an industrial steam supply main pipe power plant in the first steam extraction-industrial steam supply ratio experiment, tmgs0(l) represents steam supply temperature at the end of the industrial steam supply main pipe power plant in the first steam extraction-industrial steam supply ratio experiment, pjw (l) represents desuperheating water pressure in the first steam extraction-industrial steam supply ratio experiment, tjw (l) represents desuperheating water temperature in the first steam extraction-industrial steam supply ratio experiment, pcq (i)_jzL) represents the ith steam extraction-industrial steam supply ratio experiment_jzTurbine extraction pressure, tcq (i) of a platform turbine_jzL) represents the ith steam extraction-industrial steam supply ratio experiment_jzThe turbine extraction temperature of the platform turbine.

And step 10413, taking the average value of the steam extraction-industrial steam supply ratio of each steam extraction-industrial steam supply ratio experiment as the steam extraction-industrial steam supply ratio.

In this embodiment, the terminal device calculates the average value of the multiple experimental results, and can obtain a more accurate ratio of the extraction steam amount to the industrial steam supply amount.

Step 1042, calculate Fcq (i)_jz)＝K×Fgc(i_jz) Obtaining the steam extraction quantity of a steam turbine of the extraction condensing heat supply unit; wherein Fcq (i)_jz) Expressing the extraction of the steam turbine of the extraction condensing heat supply unit, K expressing the ratio of the extraction to the industrial supply, Fgc (i)_jz) Indicating a preset steam supply, i_jzIndicating the turbine number.

In this embodiment, the terminal device calculates the product of the ratio of the extraction steam amount to the industrial steam supply amount and the preset steam supply amount of the steam turbine to obtain the extraction steam amount of the steam turbine of the extraction condensing heat supply unit

Step 1043, determining a first extraction pressure corresponding to the current main steam flow in the pure condensing state based on the current main steam flow and the first pressure calculation function;

in this embodiment, the terminal device substitutes the current main steam flow into the first pressure calculation function to obtain a first extraction pressure corresponding to the current main steam flow in the pure condensing state.

Step 1044 is to determine a first through-flow steam volume corresponding to the current main steam flow in the pure condensing state based on the current main steam flow and the first flow calculation function.

In this embodiment, the terminal device substitutes the current main steam flow into the first flow calculation function to obtain a first through-flow steam flow corresponding to the current main steam flow in the pure condensing state.

Step 1045, calculate Fcqh (i)_jz)″＝Fcqh(i_jz)′-Fcq(i_jz) Obtaining a first through-flow steam flow corresponding to the current main steam flow under the industrial steam supply working condition; wherein, Fcqh (i)_jz) ' indicates the corresponding first through-flow steam flow of the current main steam flow in the pure condensing state, Fcq (i)_jz) The extraction steam quantity of a steam turbine of the extraction condensing heat supply unit is shown.

In this embodiment, the terminal device subtracts the extraction steam volume of the steam turbine of the extraction condensing heat supply unit from the first through-flow steam volume corresponding to the current main steam flow in the pure condensing state, so as to obtain the first through-flow steam volume corresponding to the current main steam flow under the industrial steam supply working condition.

And step 1046, determining a first extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow based on the first through-flow steam flow and the second pressure calculation function under the industrial steam supply working condition of the current main steam flow.

In this embodiment, the terminal device substitutes the first through-flow steam flow of the current main steam flow under the industrial steam supply working condition into the second pressure calculation function to obtain the first extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow. The first extraction pressure is the extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow.

Optionally, step 104 further includes:

calculating abs (pcq (i)_jz)″-pcq(i_jz) min), wherein, pcq (i)_jz) "indicates the extraction pressure of the turbine under the industrial steam supply condition corresponding to the current main steam flow, pcq (i)_jz) min represents the minimum extraction pressure;

if abs (pcq (i)_jz)″-pcq(i_jz) min) > Preset threshold, and pcq (i)_jz)″＞pcq(i_jz) min, then the current main steamThe flow is reduced by a preset value;

if abs (pcq (i)_jz)″-pcq(i_jz) min) > Preset threshold, and pcq (i)_jz)″＜pcq(i_jz) min, increasing the current main steam flow by a preset value;

if abs (pcq (i)_jz)″-pcq(i_jz) min) is less than or equal to a preset threshold value, the current main steam flow is used as the minimum main steam flow meeting the steam supply requirement.

In this embodiment, the preset threshold may be 0.001, and the smaller the threshold, the more accurate the minimum main steam flow is. If the steam extraction pressure of the steam turbine corresponding to the current main steam flow is larger than the minimum steam extraction pressure, the current main steam flow is larger, and the current main steam flow is reduced during adjustment; if the steam extraction pressure of the steam turbine corresponding to the current main steam flow is smaller than the minimum steam extraction pressure, the current main steam flow is smaller, and the current main steam flow needs to be increased during adjustment. The adjustment amount of the current main steam flow can be determined according to the difference value between the steam exhaust volume flow of the low pressure cylinder and the minimum steam exhaust volume flow.

And 105, determining the minimum peak load regulating output corresponding to the preset steam supply amount of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

Optionally, step 105 includes:

and 1051, acquiring main steam flow and unit load data corresponding to a plurality of design working conditions of the heat supply unit in a pure condensing state.

In the present embodiment, the plurality of design conditions may be 100% THA design conditions (THA represents turbine heat rate acceptance), 75% THA design conditions, and 50% THA design conditions. Each design condition corresponds to a group of main steam flow and unit load data.

And 1052, interpolating the main steam flow and the unit load data corresponding to each design working condition of the heat supply unit in the pure condensing state to obtain the unit load corresponding to the minimum main steam flow meeting the steam supply requirement.

And 1053, selecting a design working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement, and determining the steam enthalpy value of a first steam extraction section and the steam exhaust enthalpy value of a low-pressure cylinder under the design working condition, wherein the first steam extraction section is a steam turbine steam extraction section corresponding to the industrial steam supply main pipe.

In this embodiment, the terminal device may select, from three groups of main steam flows and unit load data corresponding to the 100% THA design condition, the 75% THA design condition, and the 50% THA design condition, a main steam flow closest to the minimum main steam flow that satisfies the steam supply requirement, and obtain a steam enthalpy value and a low-pressure cylinder exhaust steam enthalpy value of the first steam extraction section under the design condition corresponding to the main steam flow.

Step 1054, calculate

Obtaining the minimum peak-load-adjusting output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition;

wherein Pmin (i)_jz) The minimum peak load regulation output, Pcnmin (i) corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition_jz) Indicating the unit load corresponding to the minimum main steam flow to meet the steam supply requirement, hcq (i)_jz) The enthalpy value of the steam of the first steam extraction section under the working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement, hlpex (i)_jz) And the enthalpy value of the low-pressure cylinder exhaust steam under the working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement is represented.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.

Fig. 2 shows a schematic structural diagram of a device for determining the minimum peak load regulation output of the industrial steam supply condition of the extraction and condensation heat supply unit according to the embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

as shown in fig. 2, the device 2 for determining the minimum peak load regulation output of the industrial steam supply working condition of the extraction condensing heat supply unit comprises:

the characteristic determining module 21 is used for acquiring experimental steam supply quantity and experimental pressure difference obtained by each industrial steam supply section experiment, and determining a resistance characteristic function of each industrial steam supply section of the extraction condensing heat supply unit according to the experimental steam supply quantity and the experimental pressure difference;

the minimum pressure determining module 22 is configured to calculate a pressure difference of each industrial steam supply section under the preset steam supply amount according to a resistance characteristic function of each industrial steam supply section, and determine a minimum extraction pressure of the extraction condensing heat supply unit steam turbine under the preset steam supply amount based on the preset steam supply amount, a user-side minimum steam consumption parameter and the pressure difference of each industrial steam supply section;

an initialization module 23 for initializing a main steam flow;

the main steam flow determining module 24 is configured to determine steam extraction pressure of the steam turbine under an industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure of the steam turbine and the minimum steam extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the step until the minimum main steam flow meeting the steam supply requirement is obtained;

and the minimum output determining module 25 is configured to determine a minimum peak load regulating output corresponding to a preset steam supply amount of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

Optionally, the industrial steam supply section comprises a first industrial steam supply section, a second industrial steam supply section and a third industrial steam supply section, the first industrial steam supply section is an industrial steam supply section between the tail end of an industrial steam supply main pipe and an industrial steam supply user end, the second industrial steam supply section is an industrial steam supply section between the power plant end of the industrial steam supply main pipe and the tail end of the industrial steam supply main pipe, and the third industrial steam supply section is an industrial steam supply section between the steam extraction port of a steam turbine of the extraction and condensation heat supply unit and the power plant end of the industrial steam supply main pipe; the experimental steam supply amount comprises user side experimental steam supply amount of at least one industrial steam supply user, at least one total experimental steam supply amount and at least one experimental steam supply amount of a steam turbine of the extraction condensing heat supply unit;

the characteristic determination module 21 includes:

the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring a plurality of user side experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on a first industrial steam supply section corresponding to a target industrial steam supply user and pressure differences of the first industrial steam supply section corresponding to each user side experimental steam supply amount; the target industrial steam supply user is any industrial steam supply user;

the first characteristic determining unit is used for fitting a resistance characteristic function of a first industrial steam supply section corresponding to the target industrial steam supply user based on each user side experimental steam supply quantity of the target industrial steam supply user and the pressure difference of the corresponding first industrial steam supply section under each user side experimental steam supply quantity;

the second acquisition unit is used for acquiring a plurality of total experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on the second industrial steam supply section and the pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply amount;

the second characteristic determining unit is used for fitting a resistance characteristic function of the second industrial steam supply section based on each total experimental steam supply amount and the pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply amount;

the third acquiring unit is used for acquiring a plurality of experimental steam supply amounts of the target steam turbine obtained by performing a pipeline system resistance characteristic experiment on a third industrial steam supply section corresponding to the target steam turbine and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply amount; the target steam turbine is any steam turbine;

and the third characteristic determining unit is used for fitting a resistance characteristic function of a third industrial steam supply section corresponding to the target steam turbine based on each experimental steam supply quantity of the target steam turbine and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply quantity.

Optionally, the preset steam supply amount includes a user-side preset steam supply amount of at least one industrial steam supply user, a preset steam turbine steam supply amount and a total preset steam supply amount; the minimum steam utilization parameters at the user side comprise the minimum steam utilization pressure and the minimum steam utilization temperature of each industrial steam supply user;

the minimum pressure determination module 22 includes:

the first pressure difference determining unit is used for determining the pressure difference of the first industrial steam supply section of each industrial steam supply user under the user side preset steam supply quantity corresponding to each industrial steam supply user based on the user side preset steam supply quantity of each industrial steam supply user and the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user;

the tail end pressure determining unit is used for calculating pmgemin ═ Max [ pmin (i) + Δ p (i) ], so as to obtain the minimum pressure value at the tail end of the industrial steam supply main pipe under the preset steam supply quantity at the user side of each industrial steam supply user, wherein pmgemin represents the minimum pressure value at the tail end of the industrial steam supply main pipe, pmin (i) represents the minimum steam pressure of the ith industrial steam supply user, and Δ p (i) represents the pressure difference of the first industrial steam supply section corresponding to the ith industrial steam supply user under the preset steam supply quantity at the user side of each industrial steam supply user; max [ ] represents the maximum function;

the second pressure difference determining unit is used for obtaining the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply quantity based on the total preset steam supply quantity and the resistance characteristic function of the second industrial steam supply section;

the power plant end pressure determining unit is used for obtaining a minimum pressure value of the power plant end of the industrial steam supply main pipe based on the minimum pressure value of the tail end of the industrial steam supply main pipe and the pressure difference of a second industrial steam supply section corresponding to the total preset steam supply amount;

the third pressure difference determining unit is used for determining the pressure difference of the steam turbine of the extraction and condensation heat supply unit in the third industrial steam supply section under the steam supply quantity of the preset steam turbine based on the steam supply quantity of the preset steam turbine and the resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction and condensation heat supply unit;

a minimum extraction pressure determination unit for calculating pcq (i)_jz)min＝Pmgsmin+Δp(i_jz) Obtaining the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine, wherein pcq (i)_jz) min represents the minimum extraction pressure of a steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine, Pmgsmin represents the minimum pressure value of an industrial steam supply main pipe power plant end, and delta p (i_jz) The pressure difference, i, of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine_jzIndicating the turbine number.

Optionally, the preset steam supply amount comprises a preset steam supply amount of a steam turbine;

the primary steam flow determination module 24 includes:

a fourth obtaining unit, configured to obtain a preset steam supply amount of the steam turbine, a steam extraction amount-industrial steam supply amount ratio, a first pressure calculation function, a second pressure calculation function, and a first flow calculation function, where the first pressure calculation function is a function for calculating a first steam extraction pressure based on the main steam flow, the second pressure calculation function is a function for calculating a first steam extraction pressure based on the first through-flow steam flow, the first flow calculation function is a function for calculating the first through-flow steam flow based on the main steam flow, the first steam extraction pressure is a steam extraction pressure of a first steam extraction section, the first through-flow steam flow is a through-flow steam flow of the steam turbine after the first steam extraction section, and the first steam extraction section is a steam extraction section of the steam turbine corresponding to the industrial steam supply main pipe;

an extraction amount calculating unit for calculating Fcq (i)_jz)＝K×Fgc(i_jz) Obtaining the steam extraction quantity of a steam turbine of the extraction condensing heat supply unit; wherein Fcq (i)_jz) Expressing the extraction of the steam turbine of the extraction condensing heat supply unit, K expressing the ratio of the extraction to the industrial supply, Fgc (i)_jz) Indicating a preset steam supply, i_jzIndicating the number of the steam turbine;

the first steam extraction pressure determining unit is used for determining a first steam extraction pressure corresponding to the current main steam flow in a pure condensing state based on the current main steam flow and a first pressure calculation function;

the first through-flow steam quantity determining unit is used for determining a first through-flow steam quantity corresponding to the current main steam flow in the pure condensing state based on the current main steam flow and a first flow calculation function;

a second through-flow steam amount determination unit for calculating Fcqh (i)_jz)″＝Fcqh(i_jz)′-Fcq(i_jz) Obtaining a first through-flow steam flow corresponding to the current main steam flow under the industrial steam supply working condition; wherein, Fcqh (i)_jz) ' indicates the corresponding first through-flow steam flow of the current main steam flow in the pure condensing state, Fcq (i)_jz) The extraction steam quantity of a steam turbine of the extraction condensing heat supply unit is shown.

And the second extraction pressure determining unit is used for determining the first extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow based on the first through-flow steam flow and the second pressure calculation function of the current main steam flow under the industrial steam supply working condition.

Optionally, the fourth obtaining unit is specifically configured to:

acquiring steam supply pressure, steam supply temperature, reduced water pressure, reduced water temperature, steam extraction pressure of a steam turbine and steam extraction temperature of the steam turbine at the end of a plurality of industrial steam supply main pipe power plants, which are obtained by performing steam extraction amount-industrial steam supply ratio experiments on a steam extraction condensing and heat supply unit;

computing

wherein K (l) represents the ratio of extraction steam quantity to industrial steam supply quantity in the first test, l represents the experiment times of the ratio of extraction steam quantity to industrial steam supply quantity, hpt (p, t) represents a function of enthalpy value of medium calculated according to medium pressure and medium temperature, pmgs0(l) represents the steam supply pressure at the end of an industrial steam supply main pipe power plant in the first experiment of extraction steam quantity to industrial steam supply quantity, tmgs0(l) represents the steam supply temperature at the end of the industrial steam supply main pipe power plant in the first experiment of extraction steam quantity to industrial steam supply quantity, pjw (l) represents the desuperheating water pressure in the first experiment of extraction steam quantity to industrial steam supply quantity ratio, tjw (l) represents the desuperheating water temperature in the first experiment of extraction steam quantity to industrial steam supply quantity ratio, pcq (i)_jzL) represents the ith steam extraction-industrial steam supply ratio experiment_jzTurbine extraction pressure, tcq (i) of a platform turbine_jzL) represents the ith steam extraction-industrial steam supply ratio experiment_jzThe steam extraction temperature of the turbine of the platform steam turbine;

and taking the average value of the steam extraction-industrial steam supply ratio of each steam extraction-industrial steam supply ratio experiment as the steam extraction-industrial steam supply ratio.

Optionally, the main steam flow determination module 24 is specifically configured to:

if abs (pcq (i)_jz)″-pcq(i_jz) min) > Preset threshold, and pcq (i)_jz)″＞pcq(i_jz) min, reducing the current main steam flow by a preset value;

Optionally, the minimum output determination module 25 is specifically configured to include:

acquiring main steam flow and unit load data corresponding to a plurality of design working conditions of a heat supply unit in a pure condensing state;

interpolating main steam flow and unit load data corresponding to each design working condition of the heat supply unit in a pure condensing state to obtain a unit load corresponding to the minimum main steam flow meeting the steam supply requirement;

selecting a design working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement, and determining the steam enthalpy value and the low-pressure cylinder steam exhaust enthalpy value of a first steam extraction section under the design working condition, wherein the first steam extraction section is a steam turbine steam extraction section corresponding to an industrial steam supply main pipe;

computing

Fig. 3 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 3, the terminal 3 of this embodiment includes: a processor 30, a memory 31 and a computer program 32 stored in said memory 31 and executable on said processor 30. The processor 30, when executing the computer program 32, implements the steps in the above-mentioned method for determining the minimum peak load shaving capacity of the industrial steam supply condition of each extraction and condensation heating unit, for example, steps 101 to 105 shown in fig. 1. Alternatively, the processor 30, when executing the computer program 32, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the units 21 to 25 shown in fig. 2.

Illustratively, the computer program 32 may be partitioned into one or more modules/units that are stored in the memory 31 and executed by the processor 30 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 32 in the terminal 3.

The terminal 3 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal may include, but is not limited to, a processor 30, a memory 31. It will be appreciated by those skilled in the art that fig. 3 is only an example of a terminal 3 and does not constitute a limitation of the terminal 3 and may comprise more or less components than those shown, or some components may be combined, or different components, e.g. the terminal may further comprise input output devices, network access devices, buses, etc.

The Processor 30 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 31 may be an internal storage unit of the terminal 3, such as a hard disk or a memory of the terminal 3. The memory 31 may also be an external storage device of the terminal 3, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like provided on the terminal 3. Further, the memory 31 may also include both an internal storage unit and an external storage device of the terminal 3. The memory 31 is used for storing the computer program and other programs and data required by the terminal. The memory 31 may also be used to temporarily store data that has been output or is to be output.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A method for determining the minimum peak regulation output of an industrial steam supply working condition of a pumping condensing heat supply unit is characterized by comprising the following steps: acquiring experimental steam supply quantity and experimental pressure difference obtained by each industrial steam supply section experiment, and determining a resistance characteristic function of each industrial steam supply section according to the experimental steam supply quantity and the experimental pressure difference; according to the resistance characteristic function of each industrial steam supply section, calculating the pressure difference of each industrial steam supply section under the preset steam supply amount, and determining the minimum steam extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply amount based on the preset steam supply amount, the lowest steam utilization parameter of the user side and the pressure difference of each industrial steam supply section; initializing a main steam flow; determining steam extraction pressure of a steam turbine under an industrial steam supply working condition corresponding to the current main steam flow; adjusting the current main steam flow based on the difference value between the steam extraction pressure of the steam turbine and the minimum steam extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow, and repeating the step until the minimum main steam flow meeting the steam supply requirement is obtained; and determining the minimum peak-load-adjusting output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement.

2. The method for determining the minimum peak load capacity of the industrial steam supply working condition of the extraction and condensation heat supply unit according to claim 1, wherein the industrial steam supply section comprises a first industrial steam supply section, a second industrial steam supply section and a third industrial steam supply section, the first industrial steam supply section is an industrial steam supply section between the tail end of an industrial steam supply main pipe and an industrial steam supply user end, the second industrial steam supply section is an industrial steam supply section between an industrial steam supply main pipe power plant end and the tail end of the industrial steam supply main pipe, and the third industrial steam supply section is an industrial steam supply section between a steam extraction opening of a steam turbine of the extraction and condensation heat supply unit and the industrial steam supply main pipe power plant end; the experimental steam supply amount comprises a user side experimental steam supply amount of at least one industrial steam supply user, at least one total experimental steam supply amount and an experimental steam supply amount of at least one steam turbine of the extraction condensing heat supply unit;

the step of obtaining the experimental steam supply quantity and the experimental pressure difference obtained by the experiment of each industrial steam supply section and determining the resistance characteristic function of each industrial steam supply section according to the experimental steam supply quantity and the experimental pressure difference comprises the following steps:

acquiring a plurality of user side experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on a first industrial steam supply section corresponding to a target industrial steam supply user and pressure difference of the first industrial steam supply section corresponding to each user side experimental steam supply amount; the target industrial steam supply user is any industrial steam supply user;

fitting a resistance characteristic function of a first industrial steam supply section corresponding to the target industrial steam supply user based on each user side experimental steam supply quantity of the target industrial steam supply user and the pressure difference of the first industrial steam supply section corresponding to each user side experimental steam supply quantity;

acquiring a plurality of total experimental steam supply amounts obtained by performing a pipeline system resistance characteristic experiment on the second industrial steam supply section and pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply amount;

fitting a resistance characteristic function of the second industrial steam supply section based on each total experimental steam supply amount and the pressure difference of the second industrial steam supply section corresponding to each total experimental steam supply amount;

acquiring a plurality of experimental steam supply amounts of a target steam turbine obtained by performing a pipeline system resistance characteristic experiment on a third industrial steam supply section corresponding to the target steam turbine and a pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply amount; the target steam turbine is any steam turbine;

and fitting a resistance characteristic function of a third industrial steam supply section corresponding to the target steam turbine based on each experimental steam supply quantity of the target steam turbine and the pressure difference of the third industrial steam supply section of the target steam turbine under each experimental steam supply quantity.

3. The method for determining the minimum peak load regulation output of the industrial steam supply working condition of the extraction and condensation heat supply unit according to claim 2, wherein the preset steam supply amount comprises a user-side preset steam supply amount of at least one industrial steam supply user, a preset steam turbine steam supply amount and a total preset steam supply amount; the user side minimum steam consumption parameters comprise minimum steam consumption pressure and minimum steam consumption temperature of each industrial steam supply user;

the method comprises the following steps of calculating the pressure difference of each industrial steam supply section under the preset steam supply amount according to the resistance characteristic function of each industrial steam supply section, and determining the minimum steam extraction pressure of the steam turbine of the condensing heat supply unit under the preset steam supply amount based on the preset steam supply amount, the minimum steam consumption parameter of the user side and the pressure difference of each industrial steam supply section, wherein the minimum steam extraction pressure comprises the following steps:

determining the pressure difference of the first industrial steam supply section of each industrial steam supply user under the user side preset steam supply quantity corresponding to each industrial steam supply user based on the user side preset steam supply quantity of each industrial steam supply user and the resistance characteristic function of the first industrial steam supply section corresponding to each industrial steam supply user;

calculating pmgemin ═ Max [ pmin (i) + Δ p (i) ], and obtaining a minimum pressure value at the tail end of an industrial steam supply main pipe under the preset steam supply quantity of the user side of each industrial steam supply user, wherein pmgemin represents the minimum pressure value at the tail end of the industrial steam supply main pipe, pmin (i) represents the minimum steam pressure of the ith industrial steam supply user, and Δ p (i) represents the pressure difference of a first industrial steam supply section corresponding to the ith industrial steam supply user under the preset steam supply quantity of the user side of each industrial steam supply user; max [ ] represents the maximum function;

obtaining the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply quantity based on the total preset steam supply quantity and the resistance characteristic function of the second industrial steam supply section;

obtaining a minimum pressure value of the power plant end of the industrial steam supply main pipe based on the minimum pressure value of the tail end of the industrial steam supply main pipe and the pressure difference of the second industrial steam supply section corresponding to the total preset steam supply amount;

determining the pressure difference of the steam turbine of the extraction condensing heat supply unit in a third industrial steam supply section under the preset steam turbine steam supply quantity based on the preset steam turbine steam supply quantity and the resistance characteristic function of the third industrial steam supply section corresponding to the steam turbine of the extraction condensing heat supply unit;

calculation pcq (i)_jz)min＝Pmgsmin+Δp(i_jz) Obtaining the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine, wherein pcq (i)_jz) min represents the minimum extraction pressure of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine, Pmgsmin represents the minimum pressure value of the industrial steam supply main pipe power plant end, and delta p (i)_jz) The pressure difference, i, of the third industrial steam supply section of the steam turbine of the extraction condensing heat supply unit under the preset steam supply quantity of the steam turbine_jzIndicating the turbine number.

4. The method for determining the minimum peak shaving output of the industrial steam supply condition of the extraction and condensation heat supply unit according to claim 1,

the preset steam supply comprises a preset steam supply of a steam turbine;

the step of determining the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow comprises the following steps:

acquiring preset steam supply quantity of the steam turbine, a ratio of extraction quantity to industrial steam supply quantity, a first pressure calculation function, a second pressure calculation function and a first flow calculation function, wherein the first pressure calculation function is a function for calculating first extraction pressure based on main steam flow, the second pressure calculation function is a function for calculating first extraction pressure based on first through-flow steam quantity, the first flow calculation function is a function for calculating first through-flow steam quantity based on main steam flow, the first extraction pressure is extraction pressure of a first extraction section, the first through-flow steam quantity is through-flow steam quantity of the steam turbine behind the first extraction section, and the first extraction section is a steam extraction section of the steam turbine corresponding to an industrial steam supply main pipe;

calculation Fcq (i)_jz)＝K×Fgc(i_jz) Obtaining the steam extraction quantity of a steam turbine of the extraction condensing heat supply unit; wherein Fcq (i)_jz) Expressing the extraction of the steam turbine of the extraction condensing heat supply unit, K expressing the ratio of the extraction to the industrial supply, Fgc (i)_jz) Representing the preset steam supply amount of the steam turbine i_jzIndicating the number of the steam turbine;

determining a first extraction pressure corresponding to the current main steam flow in a pure condensing state based on the current main steam flow and the first pressure calculation function;

determining a first through-flow steam quantity corresponding to the current main steam flow in a pure condensing state based on the current main steam flow and the first flow calculation function;

calculating Fcqh (i)_jz)″＝Fcqh(i_jz)′-Fcq(i_jz) Obtaining a first through-flow steam flow corresponding to the current main steam flow under the industrial steam supply working condition; wherein, Fcqh (i)_jz) ' indicates the corresponding first through-flow steam flow of the current main steam flow in the pure condensing state, Fcq (i)_jz) Representing the steam extraction amount of a steam turbine of the extraction condensing heat supply unit;

and determining a first extraction pressure under the industrial steam supply working condition corresponding to the current main steam flow based on the first through-flow steam flow and the second pressure calculation function under the industrial steam supply working condition of the current main steam flow.

5. The method for determining the minimum peak load regulation output of the extraction and condensation heat supply unit industrial steam supply working condition according to claim 4, wherein the step of obtaining the ratio of the steam extraction amount to the industrial steam supply amount comprises the following steps:

computing

6. The method for determining the minimum peak load regulation output of the extraction condensing heating unit under the industrial steam supply working condition according to any one of claims 1 to 5, wherein the adjusting the current main steam flow based on the difference between the steam extraction pressure of the steam turbine under the industrial steam supply working condition corresponding to the current main steam flow and the minimum steam extraction pressure comprises:

if abs (pcq (i)_jz)″-pcq(i_jz) min) > Preset threshold, and pcq (i)_jz)″＞pcq(i_jz) min, thenThe current main steam flow is reduced by a preset value;

7. The method for determining the minimum peak regulation output of the extraction and condensation heat supply unit under the industrial steam supply working condition according to claim 6, wherein the step of determining the minimum peak regulation output corresponding to the preset steam supply amount of the extraction and condensation heat supply unit under the industrial steam supply working condition based on the minimum main steam flow meeting the steam supply requirement comprises the following steps:

acquiring main steam flow and unit load data corresponding to a plurality of design working conditions of the heat supply unit in a pure condensing state;

computing

Obtaining the minimum peak load regulation output corresponding to the preset steam supply quantity of the extraction condensing heat supply unit under the industrial steam supply working condition;

wherein Pmin (i)_jz) The minimum peak load regulation output, Pcnmin (i), corresponding to the preset steam supply quantity under the industrial steam supply working condition of the extraction condensing heat supply unit is represented_jz) Representing the unit load corresponding to the minimum main steam flow that meets the steam supply requirement, hcq (i)_jz) Representing the main steam flow andthe steam enthalpy value of the first steam extraction section under the working condition that the minimum main steam flow meeting the steam supply requirement is closest to hlpex (i)_jz) And the enthalpy value of the low-pressure cylinder exhaust steam under the working condition that the main steam flow is closest to the minimum main steam flow meeting the steam supply requirement is represented.

8. The utility model provides a take out and congeal confirming device that heat supply unit industry supplied vapour operating mode minimum peak regulation power, its characterized in that includes:

the initialization module is used for initializing the main steam flow;

9. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for determining minimum peak shaver output for steam supply conditions of an extraction and condensation heating unit according to any one of claims 1 to 7.

10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for determining a minimum peak shaver output for an industrial steam supply operating mode of an extraction and condensing heat supply unit according to any one of claims 1 to 7.